Species
Bonelli's Eagle
Aquila fasciata
The queen of the southern skies — São Mamede's emblem
The Bonelli's Eagle is the symbol of the Serra de São Mamede Natural Park, and finding one is the quiet ambition of many a visit. It's a large, powerful eagle — and, true to its reputation, it can be surprisingly hard to find even where it's faithfully resident.
Where & when to see it here
A year-round resident of the Serra de São Mamede — scan the rockier ridges and crags where it nests, and the open montado and pasture edges where it hunts. Patience over a good vantage at the right hour beats chasing.
Field marks & behaviour
Adults show a clean white belly against darker wings and a pale patch on the back; juveniles have warm, rufous-orange underwing coverts. Highly territorial and monogamous, a pair holds a large range and keeps several alternating nests. A specialist bird-hunter — it takes red-legged partridge and pigeons on the wing, plus rabbit — which earned it the old Portuguese name águia-perdigueira.
Why the Alto Alentejo
This is one of the species the region is monitored for: it nests on the park's quartzite crags, and the Alentejo population has been slowly recovering (from 27 pairs with nests in 2005 to around 65 by 2020). It is also Endangered in Portugal and sensitive to disturbance at the nest — so we watch from a distance, from the public vantages, and never press toward a nesting cliff. Seeing one well is a privilege earned by stillness.
Plan your visit
Walk the same ground as the bonelli's eagle.
The newsletter
What's flying now
A short, seasonal note from the Serra — what to listen for, what's passing through.